Circuit breaker transmission structure

The utility model provides a circuit breaker transmission structure which comprises a support, a cam and a support supporting and fixing plate, the support supporting and fixing plate is installed in the middle of the support, a cam limiting sleeve is installed on the upper portion of the support, the upper portion of the cam is connected with the cam limiting sleeve, and a spring unit is installed on the lower portion of the cam through a cam roller shaft. The bottom of the spring unit is connected with an arc extinguish chamber connecting shaft, the bottom of the arc extinguish chamber connecting shaft is connected with one end of a flexible coupling, and the other end of the flexible coupling inclines upwards and is connected with an external component through a flexible coupling fixing nut. After the scheme is adopted, the accuracy of the opening and closing position of the arc extinguish chamber can be ensured, the opening and closing of the circuit breaker cannot be influenced by over-impact rebound of